Barriers to expanding primary care roles for chiropractors: The role of chiropractic as primary care gatekeeper.
D002684:Chiropractic / Q000458:organization & administration*; D002983:Clinical Competence / Q000592:standards*; D019033:Delivery of Health Care, Integrated; D020793:Gatekeeping; D006801:Humans; D026882:Manipulation, Chiropractic / Q000191:economics / Q000592:standards / Q000706:statistics & numerical data; D011320:Primary Health Care / Q000592:standards*; D024382:Professional Role; D011785:Quality Assurance, Health Care; D014481:United States